ENGLISH- DESALINATION

Question 1:

[multistage flash distillation,

 less than 1,000 ppm, 

Saudi Arabia , 

glaciers/ ice, 

 Reverse Osmosis]

Question 2:

a. Magazine

b. expenditure involved

c. arid regions

Question 3:

a. Three fourths of the water on Earth is salt water. A large percentage of fresh water is in the form of ice. The population is growing and so are the demands for portable water.

Many regions are dry and in urgent need of water. The large quantity of sea water

seems the only option open to man.

Dumping the waste from desalination plants which is high in salt content makes the process more difficult. It can also harm ocean life.

A large amount of energy is required to power desalination plants, which is a huge

expense. Burning huge quantities of fossil fuels to obtain energy is a cause for concern.

b. It is expensive to transport the water from the ocean or the sea to desalination plants

situated in regions away from the coast or on a high altitude.

c. Nuclear energy is potentially the most cost-effective energy source, but the public is

against a nuclear power plant within the limits of towns and cities. So it remains largely

unexploited.

d. New methods and better solutions to overcome the obstacles that exist in the large scale use of the desalination process is needed to ensure that people in arid regions are able to fulfill their daily needs.